Process of making fertilizers



of'the residue with acid Patented July 22,

IT D s A Es PATENT j OFFICE- vAsuJu o NIKAIDO, onimy crrY, MICHIGAN, Assreuon r0 vfronrenn 011m 'No Drawing.

To aZZZ whom it may concern: 1

Be it known that I, YASUJURO NIKAIDO, a citizen of- Japan, and a resident of Bay City, in the county of Bay and State of Michigamll; S. A., have made anew and useful Invention in Processes of Making Fertilizers, of which the following is a specification. I

The invention relates to a process of making fertilizers, and has for its primary object the provision of an improved process for making a fertilizer containing a relatively high percentage of nitrogen and potash from beet sugar residue in a form which is not sticky and does not become sticky, and which may, therefore, be stored and handled conveniently. Here-tofore' when this has been attempted with a mixture of phosphate or phosphate rock with a suflicient proportion of beet sugar residue to give the desired percentage of nitrogen and potash, the resultant mixture has either been so sticky as to be .handled and applied only with difliculty, or has been of such a charac ter that it rapidly absorbed moisture from the atmosphere and thus soon arrived at such sticky condition. My method is designed to overcome this difliculty and permit the use of a relatively high percentage equivalent) with product and without producing a. product which will absorb sufiicient moisture from the atmosphere to become damp and sticky. This result is accomplished by the application of acid andhat in such way as to destroy the organicrsubstances in the residue,

which, l the sticky quality to the mixture as heretofore made, thefappli-cation ofthe acid alsoserving to prevent the loss of'the nitrogen, which would otherwise occurunder-the application of the-relatively High temperature em loyed as hereinafter set-forth. a

carrying out the process one procedure follows: Ten parts of bee't residue are evaporated until free from water, and heated'np toabout 225C. This material is then treated withtwo partsofisulphuric acid and the-heatingcontinued, at the same time for about thirty minutes orlonger, the mass then being cooled; slightly and treated with warm.

water and stirred until the wholemass becomes pasty; This mass of pasty material is then-poured over ten. parts of acidphosphosphate (01. its. out producing a wet sticky in my opinion, are responsible for.

Application filed August 28,1922. Serial ,lto. 584,865.

phate, containing 16 per cent of phosphoric acld, placed in a specially designed steam acketed apparatus wherein the beet residue and phosphate are thoroughly mixed, dried and granulated at a'temperature not exceeding 100 C. 4

This fertilizer contains approximately the 1 following plant foods:

L v Per cent.

Nitrogen (N) 2,00 Phosphoric acid (P,O 8.00 Potash (K O) 41:00

The fertilizer thus obtained does notabsorb.

moisture from the atmosphere, or' at least the absorption is relatively so low that the powder does not become sticky,,an'd remains permanently in powder form, so that the I material ma be stored and handled conveniently.

' Q I l In my opinion, the treating of the residue with the sulphuric acid tends to'destroy organic substances, which would otherwise impart a sticky quality to the product, the sulphuric acid being one of the most powerful destructive agents of organic substances.

The application of the relatively high temperature to the material, ranging from 220 to 250 0., not only serves to drive off the moisture contained in the residue, but also assists in destroylng-the organic substances, which I regard as responsible for the sticky quality of the product when beet residue is applied to acid phosphate or phosphate rock. The application of high temperature after the treatment with the sulphuric acid also intensifies the action of the acid in destroy ing the organic substances.

A further object in treating the residue with the sulphuric acid is to arrest the nitro-- gen'which is evolved from nitrogenous organic substances when subjected to high temperatures. When heated to a high tem perature, ranging upwards of 200 C., the I nltrogenous organic substances in :the residue partially decompose, giving off nitrogen in the form ofammonla or amine gases, which, combined with the sulphuric acid,

form sulphate of ammonium and hydI' Q 105 sulphate of amines, thereby preventing a loss of nitrogen.

. The acid phosphate is preferably the super phosphate of commerce, consisting of acid calcium phosphate and calcium sulphate, the percentage o phosphoric acid contained in t-aining this compound ranging from sixteen to fortyl-four, according to the raw material used in the production-of the com pound and the process of treatment. it will be understood that other materials conphosphoric acid might be used in placeof the acid phosphate, as above described, and that in the use of the term acid phosphate is intended to be included those substances containing phosphoric acid which could. be usedin place of the super Among such materials are phosphate. ground phosphate rock' ground bone, slaughter house tannage, ground Thomas slag, dried fish scrap, bone black and guano. It will also be understood that the ratio of acid phosphate to beet residue may be varied, depending upon the character of the fertilizer desired. The proportion of acid phosphate to beet residue may'range from one part of acid phosphateto one part of. residue, as heretofore described, to one part of acid phosphate to nine parts of beet residue. When'the latter extreme proportion of beet residue is employed there is a slight tendency for the product to become sticky and collect moisture, so that this appears to be about'the limit of the proportion in thisv direction. y

As illustrative of the various proportions which may be satisfactorily. used, reference .is directed to the following table, setting forth the proportions an d the plant foods in the" finished product when an acid phosphate is used containing sixteen percent of phosphoric acid:

' g i p ose ii iie, Ni rogen Elfi- Potash.

n v P305.

Part8. Parts. Per cent. Percent. 1 01 cent. '7

lEnstead of using ac contains 16 percent of phosphate made up acid and heating at a temp I subscribed my name v 1922. idlphosphatewhich phosphoric acid, containing. a higher percent of be used or a combination of two containing different percentages of acid- For instance, it is feasible to use a in part of the 16 per cent acid material and in partfofthe 44: percent acid material. Following is a table showing such a modification: L

phosphate acid may phosphates B t W tt h iit i P11 ee p 051) 9, ep osp a e I 05. residue. 10% 44% Nitmgenacid. Pmsh- Parts. Parts Paris. Per cent. Per cent Per cent. 5 M 5.00 1.70 8.0 4.0 6 3. 40 0. 00 2.16 s. 0- 4. s 7 1.85 1.15 2. 52 8.0. .5. 6

What'li claim is: 1. The process of making a fertilizerin solid form, which consists in treating conc'entrated beet sugar residue with sulphuric erature upwards (1 phosphate and ss of making a fertilizer in 'ch consistsin treating conat residue with sulphuric temperature upwards v i of 200 C., mixing with acid phosphate and then drying the phosphate. to resl product, the proportion of 'due by weight being one on part of phosphate to from one to nine parts of residue.

.lln. testimony w ereof, T have hereunto this 19th day of Aug,

- YASUJURO NIKAIDO. 

